Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a697413a3c249f9…

MALICIOUS

PDF

36.0 KB Created: 2020-11-07 07:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ccc4b888db17164b97c4209cb00a23c9 SHA-1: 86ad4248db87dcbe7ffec710727c28a624e3cda2 SHA-256: 1a697413a3c249f90f1f5a1a07f055892f539d90bad7442cd98e860b0aa689d3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious infrastructure, disguised as a search result for a school calendar. This suggests a phishing or scam attempt to lure users to a compromised site. The ML classifier strongly indicates maliciousness, and the embedded URL is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/aws?keyword=fulton+county+ga+school+calendar+2019+2020 In PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/4d6ba.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/jisokogejuzaput_sufarozamij.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/10c53f54e69b.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/sigun-misul-degadolisuvevo-jelofaxitalafon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f8aae1bdf476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6121ac2-fa7e-42f0-8793-1b66ef14e993/rusojozibajibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbea4755-308b-4430-84c7-1405f06989fb/motorola_talkabout_t5410_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bossa_nova_guitar_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc8f5b8-feda-48a6-abc6-e1f4cbd72aaf/math_7_unit_2_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e50714d-fb75-4567-a120-39162bb9a2ec/43516317761.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/new_wave_cable_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3f4b4e-60df-4267-b771-e48672a8c501/1682089989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65451da-0596-433f-a6e1-e65fc9e28ecb/vesojuvula.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D83 5740 bytes
SHA-256: 6f24b99d500dd1d642824124dd6682bb73764c7fd6fa09dea46085a04cac35a3
font_01_sfnt_off00006112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 10112 bytes
SHA-256: f03f51d39942ced6fcda60647bb3abfb631605bd0e3ed68409b3ae0779046314